CN101741425B - Frequency spectrum optimization method, device and system - Google Patents

Abstract

The invention discloses a frequency spectrum optimization method, device and system. The method, device and system relates to a spectrum management center (SMC), wherein the method includes the following steps: a first SMC acquires operation information of corresponding line and simultaneously acquires the operation information of corresponding line of a second by a communication interface, and a scheme is selected according to the operation information of corresponding line of the first SMC and the operation information of corresponding line of the second SMC to optimize the corresponding line of the first SMC. The invention can cause a plurality of SMCs in the same line to intercommunicate, the SMC not only can acquire the operation information of corresponding line but also can acquire the operation information of the line possible to interfere the corresponding line of the SMC, the corresponding line is optimized on the basis of combining the information, and optimization effect can be better improved.

Description

A kind of frequency spectrum optimization method, Apparatus and system

Technical field

The present invention relates to the communications field, relate to a kind of frequency spectrum optimization method, Apparatus and system in particular.

Background technology

Service cable all comprises many to (25 pairs or more than) twisted-pair feeder basically, on each twisted-pair feeder, may move multiple different business, can produce between mutual when various types of xDSL work simultaneously and crosstalk, wherein some circuit can be because this reason performance sharply descends, when circuit was long, some circuit can not be opened any type of DSL business at all.Crosstalk is that current DSL modern (as ADSL, VDSL) influences the principal element of user rate, can be divided into FEXT (far-end cross talk) and NEXT (near-end cross) in the system.Usually the influence of NEXT is bigger than FEXT, but in ADSL/VDSL, owing to adopted and frequency multiplexing technique, the influence of FEXT will particularly mix in the environment for use all the more so at the DSLAM of local side and the DSLAM of far-end much larger than NEXT.

DSM (Dynamic Spectrum Management, dynamic spectrum management method) main purpose is to come control circuit transmitted power spectrum to make with the circuit in a bundle cable by the optimization algorithm to be subjected to the little cross talk effects of trying one's best in the course of the work, thereby promotes track stability, improves the achievable rate of circuit and reduce power consumption.

DSM can adjust power according to the variation characteristic of crosstalking dynamically and reach the purpose of eliminating or weakening cross talk effects between each user, can improve speed.DSM is by the transmitted power spectrum of many circuits of spectrum management center (SMC) control, evade crosstalking mutually between the circuit, make the speed of circuit maximize, in implementation process, set up two interfaces by spectrum management center (SMC) and the method, apparatus DSLAM of office, an interface is the parameter information of collecting the circuit operation, as fading channel, background noise, crosstalk channels, transport-type, targeted rate, maximum gross power etc.; Another interface is the parameterized template that issues after the optimization.SMC at first collects the operation information of circuit by DSLAM, information is collected the back that finishes and is optimized at backstage startup DSMLeve12 algorithm, obtains the optimization power spectrum of every circuit, and SMC will optimize power spectrum and be handed down to the DSLAM execution.

After collecting the information of circuit, DSM mainly is Discrete multi-tone modulation (DMT) technology modulation signal that adopts frequency division multiplexing.Supposing has K user (circuit) in the DSL line system, use N tone (frequency bandwidth of a tone is 4312.5Hz) to send signal, the receiving terminal of each modem (modulator-demodulator) with other modem to its interference as noise, calculate the bit of user on each tone then and load.Load by the bit of user on each tone.Then according to the shannon capacity formula, k user's data speed is formulated as:

$R_k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{b}_n^k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{H_n^{k,k}{S}_n^k}{\mathrm{\Γ}(\underset{j\≠k}{\mathrm{\Σ}}{H}_n^{k,j}{S}_n^j+{\mathrm{\σ}}_n^2)})$ Formula (1)

Wherein,

Represent that the bit of k user on n tone loads; Г is the signal to noise ratio allowance; N represents the number of tone, and K represents number of users;

Represent the fading channel of k user on n tone; Represent that k user sends the range value of signal at n tone;

Represent that j user sends the range value of signal at n tone; Be illustrated in n last j the user of tone to k user's far-end cross talk (FEXT) channel;

Represent the background noise of k user on n tone.

In the formula (1),

Represent the reception signal of k user on n tone, $\underset{j\≠k}{\mathrm{\Σ}}{H}_n^{k,j}{S}_n^j$ Represent the interference signal that be subjected to other user of k user on n tone.By formula (1) as can be known, when crosstalking $\underset{j\≠k}{\mathrm{\Σ}}{H}_n^{k,j}{S}_n^j$ When bigger, have a strong impact on the transmission capacity of circuit k, reduced line speed.Therefore, can basis

Size control the range value of the transmission signal of user j

Make $\underset{j\≠k}{\mathrm{\Σ}}{H}_n^{k,j}{S}_n^j$ Influence minimum, the speed R of user k like this _kCan reach maximum.

And adopt this optimization method can only be applied in single operator control under the situation of all circuits, if there are a plurality of operators to control same cable simultaneously, part circuit is optimized, another part circuit is not optimized, the circuit that does not have so to optimize may produce bigger interference to the circuit of optimizing, and makes and optimizes back circuit instability.On the other hand, in most cases, the not exigent speed of user, the speed maximization not only can consume more power, and these power also can produce bigger interference to other operator's circuit.

Summary of the invention

The invention provides a kind of frequency spectrum optimization method, device and system, make when circuit is optimized the interference that can 4 takes into full account All other routes.

The invention provides a kind of frequency spectrum optimization method, may further comprise the steps:

The first spectrum management center (SMC) obtains the operation information of a described SMC corresponding line;

A described SMC obtains the operation information of the 2nd SMC corresponding line;

A described SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line.

The present invention provides a kind of SMC device simultaneously, comprising:

Collecting unit is collected the operation information of a SMC corresponding line and described operation information is uploaded to decision package;

Communication unit is used for and the 2nd SMC communicates, comprise send the request that receives described the 2nd SMC corresponding line operation information and, receive the operation information of described the 2nd SMC corresponding line that described the 2nd SMC sends;

Decision package, the operation information of a described SMC corresponding line of collecting according to collecting unit and the operation information of described the 2nd SMC corresponding line that described communication interface is collected are selected prioritization scheme;

Optimize the unit, gather the prioritization scheme that the operation information of described the 2nd SMC corresponding line that the operation information of a SMC corresponding line and described communication interface collect selects according to described decision package according to described collecting unit corresponding line is optimized, optimize and finish the back and generate the optimization template;

Issue the unit, the instruction that is used for the described decision package of reception issues described optimization template.

The present invention also provides a kind of frequency spectrum optimization system, and described system comprises a SMC and the 2nd SMC, comprising:

A described SMC collects the operation information of a described SMC corresponding line, and sends the request of the operation information that receives described the 2nd SMC corresponding line to described the 2nd SMC;

After described the 2nd SMC receives described request, if described the 2nd SMC accepts described request, the operation information of described the 2nd SMC corresponding line is sent to a described SMC;

A described SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line.

The technical program makes to have the function of intercommunication mutually between the different SMC by setting up the communication interface of different SMC.Obtaining under the own circuit operation information situation, also can obtain the operation information of other operator's circuit, SMC makes the prioritization scheme of taking can prevent uncontrollable circuit to the cross talk effects of circuit to be optimized by considering the interference of other uncontrollable circuit, ensures and optimizes effect.

Description of drawings

Fig. 1 is the first embodiment schematic diagram;

Fig. 2 is SMC device schematic diagram;

Fig. 3 is the frequency spectrum optimization system schematic.

Embodiment

Below in conjunction with the accompanying drawing among the embodiment the present invention is known complete description.

When circuit is carried out frequency spectrum optimization, if there are a plurality of operators to control same cable simultaneously, if so a part of circuit has carried out line optimization, and another part does not carry out line optimization, the circuit that does not carry out line optimization like this will produce bigger interference to the circuit that has carried out line optimization, making the circuit that has carried out optimizing performance occur descends or the unsettled situation of circuit, therefore, when carrying out frequency spectrum optimization, need to understand the relevant ruuning situation that other may constitute the circuit that disturbs to pre-optimization circuit.

The invention provides a kind of frequency spectrum optimization method, this method makes to have the ability of intercommunication mutually between the different SMC by setting up communication interface for spectrum management center (SMC).When being optimized, circuit of SMC after obtaining own circuit operation information situation, also obtains the operation information with the circuit of other operator in a bundle circuit as much as possible.Operation information by taking all factors into consideration own control circuit and other may constitute the operation information to the own circuit that disturbs, and take strategy to be optimized, the structure optimum that makes optimization.

In concrete optimizing process, can adopt following several scheme to be optimized:

Scheme one, as shown in Figure 1:

The 101st step: the SMC (SMC1) that need carry out line optimization collects the operation information of control circuit by the method, apparatus DSLAM of office, as fading channel, background noise, crosstalk channels, transport-type, targeted rate, maximum gross power etc., wherein, crosstalk channels is possible constitute the channel that disturbs to control circuit, and transport-type, targeted rate and maximum gross power are used for the transmission rate of control circuit is limited;

The 102nd step: SMC1 sends and obtains the request of All other routes operation information to other SMC, after other SMC response request, with the fading channel of institute's control circuit, b table, signal to noise ratio allowance, transmission spectrum type, transmitted power spectrum, send gross power and whether carried out DSM and optimized sign etc. and send to SMC1 by communication interface; If a certain SMC refusal request, this SMC will send the message of refusal request to SMC1, SMC1 then is presumed to maximum transmitted power to the transmitted power of the SMC corresponding line of this refusal request, and wherein, the b table is for the size of the interference of the circuit of judging All other routes SMC1 control.

The 103rd step: the topological structure that obtains whole cable by LEC ILEC;

If A. obtain the success of cable topology information, then according to this topological structure that obtains, estimate other SMC control circuit to the crosstalk channels model of SMC1, by obtaining the crosstalk channels model, can obtain the structure of cable channel.；

If B. obtain the failure of cable topology information, then add up the historical signal to noise ratio custom of control circuit amount;

The 104th step: according to the Information Selection optimization method that obtains:

If A. other circuit has all carried out DSM optimization, the circuit that does not perhaps carry out DSM optimization is very little to the interference of SMC1 institute control circuit, then carries out common DSM and optimizes pattern;

If B. other circuit is not optimized, and interference is very strong, then these interference is optimized as AXT, and it is as follows to optimize formula:

$R_k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{b}_n^k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{H_n^{k,k}{S}_n^k}{\mathrm{\Γ}(\underset{j\∈\mathrm{ILEC}}{\underset{j\≠k}{\mathrm{\Σ}}}{H}_n^{k,j}{S}_n^j+\underset{l\∈\mathrm{CLEC}}{\underset{l\≠k}{\mathrm{\Σ}}}{H}_n^{k,l}{S}_n^l+{\mathrm{\σ}}_n^2)})$

Wherein,

Represent that the bit of k user on n tone loads; Г is the signal to noise ratio allowance; N represents the number of tone, and K represents number of users;

Represent the fading channel of k user on n tone;

Represent that k user sends the range value of signal at n tone;

Represent that j user sends the range value of signal at n tone;

Be illustrated in n last j the user of tone to k user's far-end cross talk (FEXT) channel;

Represent the background noise of k user on n tone.

Represent the reception signal of k user on n tone, $\underset{j\≠k}{\mathrm{\Σ}}{H}_n^{k,j}{S}_n^j$ Represent the interference signal that be subjected to other user of k user on n tone.

If C. can't obtain the topological structure of cable, then the historical signal to noise ratio custom quantitative statistics result according to the SMC1 corresponding line draws the size that every circuit is subjected to average total amount of crosstalk, and these interference volumes as background noise are optimized, and formula is as follows:

$R_k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{b}_n^k=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{H_n^{k,k}{S}_n^k}{\mathrm{\Γ}(\underset{j\∈\mathrm{ILEC}}{\underset{j\≠k}{\mathrm{\Σ}}}{H}_n^{k,j}{S}_n^j+{\mathrm{\σ}}_{\mathrm{CLEC}}^2+{\mathrm{\σ}}_n^2)})$

$\min \underset{k=1}{\overset{K}{\mathrm{\Σ}}}\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{S}_n^k$

$s.t{.R}_k\≥R_k^{t\arg \mathrm{et}},$ k＝1，2，...，K.

$\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{S}_n^k\≤P_k,$ k＝1，2，...，K.

$0\≤S_n^k\≤S_n^{k,\max },$ k＝1，...，K，n＝1，...，N.

0≤S ^k≤S ^k，law，k∈RT

The 105th step: optimize finish after, whether issue the optimization result by the SMC decision-making, if then issue and optimize template and carry out to DSLAM by issuing the unit; If not, then do not carry out the optimization result;

The 106th step: optimize and finish.

Scheme two:

The first step: the parameter information of the receiving interface collection circuit operation of the method, apparatus DSLAM of office is separately passed through at each spectrum management center (SMC), as fading channel, background noise, crosstalk channels, transport-type, targeted rate, maximum gross power etc.;

Second step: spectrum management center (SMC) be interactive information each other, is optimized simultaneously, and optimisation strategy takes the DSM of common minimum power to optimize, and after optimization finishes, waits pending optimization result;

The 3rd step: each SMC is divided into strong jamming group and weak jamming group according to the topological relation of circuit between all circuits of oneself controlling with institute's control circuit;

The 4th step: after each SMC carries out the optimization template of strong jamming group circuit separately at first simultaneously, after being finished, send the message that runs succeeded to other SMC, all receive the message that runs succeeded of other SMC as all SMC after, the line optimization result of weak jamming group is carried out in beginning successively.

The present invention also provides a kind of SMC device, this device can intercom mutually with other SMC, as shown in Figure 2, described device comprises reception information unit 201, transmission information unit 202, issues unit 203, decision package 204, optimizes unit 205 and collecting unit 206.When conducting transmission line is optimized, collecting unit 206 is at first collected the operation information of control circuit, then by sending information unit 202 sends request from the operation information that receives other SMC corresponding line to other SMC, after other SMC accept this request, the operation information of corresponding line is sent to this SMC, and this SMC receives the operation information of these circuits by reception information 201.Decision package 204 is optimized the operation information selection scheme in synthetical collection unit 206 and the reception information unit 201 to control circuit.Optimizing the scheme of selecting according to decision package 204 unit 205 serves as that the basis is optimized circuit with the data that receive in information unit 201 and the collecting unit 206, generates after optimization is finished and optimizes template.Decision package 204 whether need to determine to issue the template after the optimization, issues if desired, issues unit 203 and issues and optimize template and give DSLAM.

The present invention also provides a kind of frequency spectrum optimization system, and described system comprises SMC301 and SMC303, and wherein SMC303 is one or more SMC.As shown in Figure 3, SMC301 is before being optimized circuit, at first obtain the operation information of control circuit by DSLAM302, send the request that request receives the operation information of SMC303 corresponding line to SMC303 simultaneously, if SMC303 accepts this request, then send SMC301 corresponding line operation information to SMC301, otherwise, then send the refusal request message to SMC301.SMC301 takes all factors into consideration under the operation information situation of the operation information of control circuit and SMC303 corresponding line and takes scheme that the SMC301 corresponding line is optimized, and optimizes will optimize the result after finishing and be handed down to DSLAM302.

As can be seen from the above-described embodiment, by setting up communication interface for SMC, make that the SMC of respective lines can intercom mutually in the same cable, like this when circuit is carried out line optimization by taking all factors into consideration the operation information of other circuit that may produce disturb this circuit, and take corresponding prioritization scheme, can ensure optimization effect, also can make simultaneously circuit after optimizing that the interference of other circuit is reached and minimize.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (7)

1. a frequency spectrum optimization method is characterized in that, may further comprise the steps:

The first spectrum management center SMC obtains the operation information of a described SMC corresponding line;

A described SMC obtains the operation information of the 2nd SMC corresponding line;

A described SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line;

A wherein said SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line, specifically comprises:

A described SMC obtains the topology information of whole cable from LEC ILEC;

If a described SMC obtains described topology information success, a described SMC obtains the crosstalk channels model of a described SMC according to described topology information, and a described SMC is optimized corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line;

If a described SMC obtains described topology information failure, a described SMC adds up a described SMC corresponding line and is subjected to average total amount of crosstalk, and described average total amount of crosstalk as background noise is optimized corresponding line.

2. method according to claim 1 is characterized in that, the circuit of the circuit of a described SMC correspondence and described the 2nd SMC correspondence belongs to same cable.

3. method according to claim 1 is characterized in that, the operation information that a described SMC obtains a described SMC corresponding line specifically may further comprise the steps:

A described SMC sends order to the DSLAM of a described SMC corresponding line;

Described DSLAM collects the operation information of corresponding line and operation information is uploaded to a described SMC.

4. method according to claim 1 is characterized in that, the operation information that a described SMC obtains the 2nd SMC corresponding line specifically may further comprise the steps:

A described SMC sends the request of the operation information that receives described the 2nd SMC corresponding line to the 2nd SMC;

If described the 2nd SMC accepts described request, then described the 2nd SMC collects the operation information of corresponding line and the operation information of collecting is sent to a described SMC;

If described the 2nd SMC rejecting said request then sends the refusal request message to a described SMC, a described SMC then is presumed to maximum transmitted power with the transmitted power of described the 2nd SMC corresponding line.

5. method according to claim 1, it is characterized in that, the operation information of a described SMC corresponding line comprises at least one in fading channel, background noise, crosstalk channels, transmission spectrum type, targeted rate, the maximum gross power, and the operation information of described the 2nd SMC corresponding line comprises fading channel, signal to noise ratio allowance, whether carried out at least one in the DSM optimization sign.

6. frequency spectrum optimization system, described system comprises a SMC and the 2nd SMC, it is characterized in that, comprising:

A described SMC collects the operation information of a described SMC corresponding line, and sends the request of the operation information that receives described the 2nd SMC corresponding line to described the 2nd SMC;

After described the 2nd SMC receives described request, if described the 2nd SMC accepts described request, the operation information of described the 2nd SMC corresponding line is sent to a described SMC;

A described SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line;

A wherein said SMC is optimized a described SMC corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line, specifically comprises:

A described SMC obtains the topology information of whole cable from LEC ILEC;

If a described SMC obtains described topology information success, a described SMC obtains the crosstalk channels model of a described SMC according to described topology information, and a described SMC is optimized corresponding line according to the operation information of a described SMC corresponding line and the operation information of described the 2nd SMC corresponding line;

If a described SMC obtains described topology information failure, a described SMC adds up a described SMC corresponding line and is subjected to average total amount of crosstalk, and described average total amount of crosstalk as background noise is optimized corresponding line.

7. system according to claim 6, it is characterized in that, if described the 2nd SMC rejecting said request, then described the 2nd SMC sends the message of rejecting said request to a described SMC, after a described SMC receives the message of described rejecting said request of described the 2nd SMC, described the 2nd SMC corresponding line transmitted power is presumed to maximum transmitted power.

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